This study will include two adult and two adolescent cohorts. The adult cohort includes two different groups of mothers: (a) MDD Mothers: Mothers with current or past major depressive disorder and (b) Healthy Control Mothers: Mothers with no history of psychopathology. The female adolescent cohorts are as follows: (c) High Risk Female Adolescents: Healthy female adolescents aged 12-14 with a mother reporting past or current MDD, (d) Healthy Female Adolescents: Healthy female adolescents aged 12-14 with a mother reporting no history of psychopathology.